A dataset of glacier outline in the Three-River Headwaters region in 2000–2019

The Three-River Headwaters (TRH) region (89°45'–102°23'E, 31°39'–36°12'N), located in the southern part of Qinghai Province in China and on the central-eastern part of the Tibetan Plateau, is an important water conservation area and the key area for eco-environment protection in China. The glaciers located in this region are important water supply for the Yangtze, Yellow, and Mekong rivers. Based on ASTER GDEM and Landsat TM/ OLI images acquired in 2000s, 2010s, and 2019, the outlines of individual glaciers in the TRH region were obtained by using the band ratio method combined with manual revision. Meanwhile, some properties of each glacier including name, area, elevation, mountain, drainage basin and remote sensing imagery adopted were provided. This dataset is composed of the vectorized data of glacier outlines in 2000s, 2010s and 2019, and an excel table containing the change information of individual glacier area in 2000–2019, which can be used as the basic data for research on glacier changes, the assessment of glacial water resources in the TRH region.The dataset consists of 2 subsets in total. Glacier_outlines_TRH.zip is composed of glacier outlines in the Three-River Headwaters region in 2000, 2010 and 2019, with a data volume of 16.2 MB; Glacier_change_TRH.zip is an Excel table containing area change of individual glaciers in the Three-River Headwaters region in 2000–2019, with a data volume of 168 KB.

三江源（Three-River Headwaters, TRH）地区（东经89°45′–102°23′，北纬31°39′–36°12′），地处中国青海省南部、青藏高原中东部，是我国重要的水源涵养区与生态环境保护核心区域。该区域内的冰川是长江、黄河及湄公河的关键补给水源。
本数据集基于2000年代、2010年代及2019年获取的ASTER GDEM与Landsat TM/OLI影像，采用波段比值法结合人工修订的技术手段，提取得到三江源地区单条冰川的轮廓信息；同时补充提供了每条冰川的名称、面积、海拔、所属山脉、流域以及所用遥感影像等属性信息。
本数据集共包含2个子集：其一为2000年代、2010年代及2019年三江源地区冰川轮廓矢量数据（Glacier_outlines_TRH.zip），数据量为16.2 MB；其二为包含2000–2019年三江源地区单条冰川面积变化信息的Excel表格（Glacier_change_TRH.zip），数据量为168 KB。本数据集可作为三江源地区冰川变化研究、冰川水资源评估的基础数据。